Apparatus for treating burner-gases.



J. B. F. HBRRESHOFF- A APPARATUS FOR TREATING BURNER GASES. APPLICATION FILED AUG. 16, 1907.

955,067. Patented Apr. 12, 1910.

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APPARATUS FOR TREATING BURNER GASES.

APPLICATION FILED AUG.16,1907.

Patented Apr. 12, 1910.-

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I I l I I I l u I Ill n, w 1 5 m HOZHClJS wi bmcooa QMQAMC UNITED STATES PATENT OFFICE.

JOHN B. F. HERRESHOFF, OF NEW YORK, N. 'Y., ASSIGNOR T0 GENERAL CHEMICAL COMPANY, OF NEW YORK, N.. Y., A CORPORATION NEW' YORK.

APPARATUS FOR TREATING BURNER-GASES.

Specification of Letters Patent.

Patented Apr. 12, 1910.

Original application filed August 10, 1906, Serial No. 329,968. Divided and this application filed August 16, 1907. Serial No, 388,823.

To all whom it may concern:

Be it known that I, Join: B. F. HERRE- snorr, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Apparatus for Treating Burner- Gases, of which the following is a specification.

My invention relates to apparatus for treating burner gases preparatory to the manufacture of sulfuric acid therefrom. The apparatus is designed to cool the gases and to remove from them some of the objectionable constituents before ultimate purification, and its use is to be followed by further purifying steps, and by a drying processdsuoh as treatment with strong sulfuric aci One great difliculty experienced with burner gases is their tendency to quickly de stroy the metallic walls of the cooling conduits through which they pass. WVhenever the temperature in such conduits is such that fractional condensation of strong sulfuric acid can take place, such acid at once attacks the iron, lead or analogous material which it reaches. Having found that the difliculty arises from the foregoing causes I invented means for overcoming it. In this connection I may state that neither mere external cooling of the conduit, nor the internal cooling of the gas by spraying or injection will answer for purposes of actual and continuous manufacture.

An apparatus embodying my present in vention is shown in the accompanying drawings in which Figure 1 is a general outside view of such apparatus, Fig. 2 is an enlarged View of same with parts in section, and Fig. 3 is a cross-section and plan on line 33 of Fig. 2.

The apparatus comprises a standpipe A or a series of such pipes, each provided at its lower part with an inlet connection A through which the gas to be treated enters, and near the top with an outlet connection A from which the treated gases pass to a header B, whence they are conducted to such other apparatus for purifying and other treatment as may be desired. Each standpipe A carries at its upper part a cap or sleeve C of slightly larger diameter, to permit of the formation of an annular space for overflow. This cap C is surrounded by a cylindrical wall D supported upon the stand-' pipe, and small openings C are made at or near the bottom of the cap C so that a liquid through which the acid may rise, and im-,

perforate vertical walls or weirs E over the upper edges of which the acid may flow to reach the supply pipes E.

Below the point where the outlet connection A? leaves the stand-pipe A, I locate within the pipe, an inclined catch shield A and above the opening leading to the outlet connection A I arrange a sloping gutter A, from which so much of the liquid film flowing down on the inside of the standpipe as is caught by the gutter will be directed past the opening A into the catch shield A whence it resumes its flow along the inner wall of the stand-pipe. In the outlet connection A I may'ar'range adamper F, having an operating stem F, and preferably also provided with a hydraulic seal to prevent the escape of gases, said hydraulic seal comprising a closed bell shaped portion G, which dips into a receptacle G, containing water or other liquid forming the seal.

To aid in cooling the pipe and its contents I have provided an annular tube J, connected with a suitable source of water (or other cooling medium) supply, as by a valve K, and having openings J to discharge the water downward y against the outer surface of the stand-pipe, and, if desired, into an annular trough L. The cooling water thus The open lower end of the stand-pipe dips into a tank M containing a liquid, and having an overflow M so as to form a hydraulic seal. Around the lower portion of the stand-pipe is a jacket N, which not only receives at its upper end the water which has flowed down on the outside of the standpipe, but also has a water supply pipe N at the bottom. Thus, in the said jacket water will flow upward to the outlet pipe 0. The entire stand-pipe is thus cooled by a double flow of water, some passing up and some down as described.

In operation, as the gases pass through the stand pipe they will be cooled by the weak acid flowing down on the inside, and

also by the action of the cooling liquid flowing on the outside of the stand-pipe. The inner film of fluid will preventcondensed acid from reaching and attacking the walls of the stand-pipe. Particles of impurities carried by the gases will be caught in said inner film and separated out of said gases carried to the tank or trough M, whence they may be conveniently removed, as, for instance, through pipe at. Any acid withdrawn at M, if desired, can be further cooled and purified and then returned to the supply tank E through the pipe E Instead of forming the film which flows within the stand-pipe of weak sulfuric acid the same may be formed of any other fluid adapted to the purpose.

The present application is a division of one filed by me in the United States Patent Office on August 10,1906, Serial No. 329,968.

I claim:

1. A stand-pipe for burner gases, provided with an inlet and outlet for the burner gases, a liquid inlet located near the top above the outlet of the burner gases and adjacent to the inner surface of the standpipe to produce a flowin film therein.

2. A stand-pipe for urner gases, provided with an inlet and an outlet for the burner gases, a liquid inlet located near the top above the outlet of the burner gases and adjacent to the inner surface of the standpipe to produce a flowin film therein, and means for passing a cooling fluid along the outer surface of the stand-pipe.

3. A stand-pipe for burner gases, provided with an inlet and an outlet for the burner gases, a liquid inlet located near the top and adjacent to the inner surface of the stand-pipe, to produce a flowing film therein, and means for enveloping said standpipe in a cooling fluid, moving from both ends toward an intermediate point.

4. A stand-pipe for burner gases, provided with an inlet and an outlet for the burner gases, and an annular liquid inlet located near the top above the outlet of the burner gases and adjacent to the inner surface of the stand-pi e.

5. A stand-pipe f cir burner gases, provided with an inlet and an outlet for the burner gases, a liquid inlet located near the top above the gas outlet and adjacent to the inner surface of the stand-pipe, a liquid outlet at the bottom, and a gutter for carrying the liquid past the opening through which the gases pass.

6. A stand-pipe for burner gases, provided with an inlet and an outlet for the burner gases, a liquid inlet located near the top and adjacent to the inner surface of the stand-pipe to form a continuous film therein, liquid inlets located at the top and bottom of the stand-pipe respectively on the outside thereof, and a liquid outlet located between said inlets, so that the liquid will flow both upward and downward to said outlet.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

JOHN B. F. HERRESHOFF.

\Vitnesses JOHN A. KEHLENBEQK, JOHN LOTKA. 

